Bump bumpalo from 2.6.0 to 3.5.0

[dependabot-preview]

Bumps bumpalo from 2.6.0 to 3.5.0.

Changelog

Sourced from bumpalo's changelog.

3.5.0

Released 2020-01-22.

Added

• Added experimental, unstable support for the unstable, nightly Rust allocator_api feature.

  The allocator_api feature defines an Allocator trait and exposes custom allocators for std types. Bumpalo has a matching allocator_api cargo feature to enable implementing Allocator and using Bump with std collections.

  First, enable the allocator_api feature in your Cargo.toml:

  [dependencies]
  bumpalo = { version = "3.4.0", features = ["allocator_api"] }

  Next, enable the allocator_api nightly Rust feature in your src/lib.rs or src/main.rs:

  # #[cfg(feature = "allocator_api")]
  # {
  #![feature(allocator_api)]
  # }

  Finally, use std collections with Bump, so that their internal heap allocations are made within the given bump arena:

  # #![cfg_attr(feature = "allocator_api", feature(allocator_api))]
  # #[cfg(feature = "allocator_api")]
  # {
  #![feature(allocator_api)]
  use bumpalo::Bump;
  // Create a new bump arena.
  let bump = Bump::new();
  // Create a Vec whose elements are allocated within the bump arena.
  let mut v = Vec::new_in(&bump);
  v.push(0);
  v.push(1);
  v.push(2);
  }
  

... (truncated)

Commits

• b1b432d Bump to version 3.5.0
• ecca6b9 Quiet some warnings about LayoutErr
• 0201983 Update allocator_api docs a little
• 5257fc3 Merge pull request #92 from baloo/baloo/allocator_api
• 79c9d7a readme: only enable allocator_api on nightly
• b7737fa ci: fixup valgrind installation
• 73f6484 Implement allocator_api grow and shrink methods
• b7ce727 allocator_api: use a common deallocator implementation
• c2747ec Document allocator_api usage
• fa0aab2 readme: document allocator_api support
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #193.